Commercial cover franked with 1929 15c carmine AIR and 1929 20c violet black 'Airmail Week' issue (SG 470 & 482) tied by special SEMANA AEREA MEXICO DF cds dated 12 DIC 1929 with large triangular 'SEMANA AEREA' (Aviacion Week) cachet in purple on front with airmail label at right. Addressed to GERMANY. (Muller #47, AAMC #E-2b)